Question

What are some sources of error - that are NOT human sources of error - for a recrystallization lab?

Answer 1

Recrstalization is technique of purification of compounds by selecting solvent or mixture of solvents.

Errors are mentioned below,

1. Selection of solvent:

Proper selection of solvent is important if not then compound will not puirify.

2. Use of excess solvent:

Excess use of solvent can not allow dissolved material to come out.

3. Mixture ratio:

Proper mixtuer ratio is important to get sufficient polarity that specific material has to come out.

4. Selection of temperature:

Approptiate temperature while dissolving solute as well as during crystallisation is important.

5. Complete crystalisatiom:

Do not keep material for taking all compound comes out. Complete crystalisation can bring impurity with pure product.